Customizing GoStock PHP script

I need to customize GoStock PHP script ([login to view URL]) for my photography community website. The script is demonstrated here: URL [login to view URL] Demo User: john User Pass 123456 This script allows users to sell their photos online. When a seller adds a new photo for sale the photo automatically gets watermark for protection. The buyer can purchase the full photo without the watermark (see attachment 1). I have implemented the script on my own server and it is working fine but I need to make some changes. The creator of the GoStock script is not available to help me. So I need someone with perfect PHP, Laravel and Design skills to customize this script for me. I have about 6 requirements which I can discuss with you but my main 2 requirements are as follows: 1. Customizing the upload functionality: [login to view URL] I want to give the seller the option to choose which areas on the photo to watermark. For example, the seller can add 3 circles and move them on the photo to choose the areas to be watermarked (see attachment 2) 2. Adding the option to upload and sell videos. For video if watermark can be added to the thumbnail then that is perfect but if that is difficult then it's okay without the watermark as long as the video can only be played after purchase. I will discuss the other requirements in the chat. They are simpler. The script can be downloaded for testing from [login to view URL]